I'm not sure this can be done natively in Webflow but a workaround that I personally use is the Mail app on my iPhone. If you have a smart phone you could always download a mail app and use it on your phone. Hope this helps.

You can try using zapier for this. It is meant to automate form data and webflow is on there. You should be able to take data and find another app to connect it to that will send you a text. I haven't tested this though.